CN104455200B - Squeeze film damper with floating magnetic ring - Google Patents
Squeeze film damper with floating magnetic ring Download PDFInfo
- Publication number
- CN104455200B CN104455200B CN201410807426.8A CN201410807426A CN104455200B CN 104455200 B CN104455200 B CN 104455200B CN 201410807426 A CN201410807426 A CN 201410807426A CN 104455200 B CN104455200 B CN 104455200B
- Authority
- CN
- China
- Prior art keywords
- magnet ring
- magnetic ring
- ring
- floating
- floating magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007667 floating Methods 0.000 title claims abstract description 52
- 238000013016 damping Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 238000004663 powder metallurgy Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000013872 defecation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Support Of The Bearing (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an extrusion oil film damper with a floating magnetic ring, which comprises: a housing; the oil film journal comprises a fixed magnetic ring and a fixed support capable of swinging in the radial direction, the fixed magnetic ring is fixedly arranged on the outer wall of the fixed support, the fixed support is internally used for rotatably supporting the rotating shaft, and one end of the fixed support is fixed through an elastic shaft arranged on the fixed support; the floating magnetic ring is arranged on the periphery of the fixed magnetic ring, the floating magnetic ring and the fixed magnetic ring are both magnetized in the radial direction, the opposite surfaces of the floating magnetic ring and the fixed magnetic ring are of same-polarity magnetic poles, the floating magnetic ring is positioned in the shell, and squeeze oil films are respectively arranged between the outer ring of the floating magnetic ring and the shell and between the inner ring of the floating magnetic ring and the fixed magnetic ring. The invention can effectively improve the phenomenon of strong nonlinear characteristics of rigidity and damping presented along with the increase of the eccentricity of the rotor, so that the rotor is more suitable for working under a high-speed working condition.
Description
Technical field
The present invention relates to the squeeze film damper of a kind of band floating magnet ring, be that one carries out the device of radial support and vibration damping for key components and parts rotor in high-speed rotating machine (such as centrifuge, turbine, accumulated energy flywheel etc.), belong to equipment manufacturing technology field.
Background technology
At present, can stablize in order to ensure axle system, operate efficiently, in the various high-speed rotating machines such as centrifuge, turbine, accumulated energy flywheel, often need in axle system, introduce damper device.
The rigidity that common squeeze film damper can be provided by and damping are represented by (as a example by short bearing approximation theory): stiffness coefficient, damped coefficient, from formula, the rigidity of antivibrator and the size of damped coefficient, increase along with rotor eccentricity rate ε (eccentric throw), and presenting the strongest nonlinear characteristic, this strong nonlinearity characteristic can cause the problems such as bistable state response and the low frequency precession of rotor-support-foundation system, so that rotor damper system is damaged.
Therefore, a kind of antivibrator that can improve the strong nonlinearity spy that damping changes with rotor eccentricity rate with stiffness coefficient will have important industrial application value.
Summary of the invention
The technical problem to be solved is the defect overcoming prior art, the squeeze film damper of a kind of band floating magnet ring is provided, it can be effectively improved the phenomenon of the strong nonlinearity characteristic that rigidity presents along with the increase of rotor eccentricity rate with damping, is allowed to be more suitable under high-speed working condition working.
The present invention solves above-mentioned technical problem and adopts the technical scheme that: the squeeze film damper of a kind of band floating magnet ring, and it includes:
Housing；
Oil film axle journal, described oil film axle journal includes fixing magnet ring and the most swingable fixed support, fixing magnet ring is fixedly mounted on support bracket fastened outer wall, is used for rotatably supporting rotor axial system in described fixed support, and support bracket fastened one end by it equipped with elastic shaft fix；
Floating magnet ring, described floating magnet ring is arranged on the periphery of fixing magnet ring, and float magnet ring and the equal radial magnetizing of fixing magnet ring, the one side that floating magnet ring is relative with fixing magnet ring is like pole, described floating magnet ring is positioned between housing, and the outer ring of the magnet ring that floats and housing and is respectively arranged with squeeze film between the inner ring of floating magnet ring and fixing magnet ring.
Further for can effectively reduce the frictional force brought when floating magnet ring moves, the bottom of described housing is provided with multiple spherical ball in being provided with cannelure, and cannelure, and described floating magnet ring is placed in multiple spherical ball.
Further, described housing is made up of non-magnet material.
Further, described housing is made up of aluminum alloy materials.
Further, described fixed support is made up of rustless steel or aluminum alloy materials.
Further, described elastic shaft is made up of stainless steel material.
Further, it is provided with elastic damping part between the outer ring of housing and floating magnet ring.
Further, described elastic damping part is wire netting or powder metallurgy ring.
After have employed technique scheme, during work, when rotor axial system vibrates, rotor axial system drives and is constituted the swing of oil film axle journal by the fixing magnet ring of fixed support and upper installation thereof, the principle repelled each other according to the same sex, floating magnet ring just moves under the repulsion effect of oil film axle journal upper magnetic ring, and the oil film rigidity of such oil film axle journal squeeze film generation and damping defecation are the functions of the difference of oil film axle journal and floating magnet ring eccentric throw, therefore can effectively improve the damping of antivibrator and the strong nonlinearity feature of rigidity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the squeeze film damper of the band floating magnet ring of the present invention.
Detailed description of the invention
Being clearly understood to make present disclosure be easier to, below according to specific embodiment and combine accompanying drawing, the present invention is further detailed explanation.
As it is shown in figure 1, the squeeze film damper of a kind of band floating magnet ring, it includes:
Housing 9；
Oil film axle journal, described oil film axle journal includes fixing magnet ring 7 and the most swingable fixed support 5, fixing magnet ring 7 is fixedly mounted on the outer wall of fixed support 5, for rotatably supporting rotor axial system 4 by rolling bearing 3 in described fixed support 5, and one end of fixed support 5 by its upper equipped with elastic shaft 2 fixing；Fixed support 5 can only swing and can not rotate.
Floating magnet ring 6, described floating magnet ring 6 is arranged on the periphery of fixing magnet ring 7, and float magnet ring 6 and the equal radial magnetizing of fixing magnet ring 7, the one side that floating magnet ring 6 is relative with fixing magnet ring 7 is like pole, described floating magnet ring 6 is positioned between housing 9, and the outer ring of the magnet ring 6 that floats and housing 9 and is respectively arranged with squeeze film 1 between the inner ring of floating magnet ring 6 and fixing magnet ring 7.
As it is shown in figure 1, the bottom of housing 9 is provided with multiple spherical ball 8 in being provided with cannelure, and cannelure, floating magnet ring 6 is placed in multiple spherical ball 8.The setting of cannelure is to prevent spherical ball 8 from moving radially for material.
Housing 9 is made up of non-magnet material, such as aluminium alloy (trade mark is 2A13), but is not limited to this.
Fixed support 5 is made up, when being not limited to this of rustless steel (trade mark is 1Cr18Ni9Ti) or aluminium alloy (trade mark is 2A13) material.
Elastic shaft 2 is made up of stainless steel material, and the trade mark is 1Cr18Ni9Ti, but is not limited to this.
The material of the fixing part such as magnet ring 7, floating magnet ring 6 is Nd-Fe-B, trade mark N40, uses radial magnetizing, and this part can be customized in specialized factory；Spherical ball 8, rolling bearing 3 all can be bought in market.
Also the elastic damping part such as wire netting, powder metallurgy ring can be put between housing 9 and floating magnet ring 6.
The operation principle of the present invention is as follows:
During work, rotor axial system 4 vibration drives oil film axle journal to swing, the fixing magnet ring 7 installed on it, a repulsion can be produced between the floating magnet ring 6 identical with polarity, floating magnet ring 6 is forced to move, extruding is by oil film axle journal, floating magnet ring 6 and housing 9 have collectively constituted two squeeze films 1, thus produce oil film rigidity to come support shaft system and normally work, the oil-film damping that extruding produces carrys out the energy that dissipative system is unnecessary, the oil film rigidity produced due to oil film axle journal squeeze film and damping size are the functions of the difference of oil film axle journal and floating magnet ring 6 eccentric throw, floating magnet ring 6 in device is to move, slow down the change of squeeze film gap, so that the rigidity that this device provides is improved with rotor eccentricity rate change strong nonlinearity feature with damped coefficient；It addition, permanent-magnetic clamp only swings and does not rotates in device, it is to avoid hoop action of pulling stress that permanent-magnetic clamp is brought by centrifugal force when high-speed rotation and be damaged, be allowed to be more suitable under high-speed working condition working.
Particular embodiments described above; to present invention solves the technical problem that, technical scheme and beneficial effect further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; it is not limited to the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (8)
1. the squeeze film damper of a band floating magnet ring, it is characterised in that it includes:
Housing (9)；
Oil film axle journal, described oil film axle journal includes fixing magnet ring (7) and the most swingable fixed support (5), fixing magnet ring (7) is fixedly mounted on the outer wall of fixed support (5), be used for rotatably supporting rotor axial system (4) in described fixed support (5), and one end of fixed support (5) by its upper equipped with elastic shaft (2) fixing；
Floating magnet ring (6), described floating magnet ring (6) is arranged on the periphery of fixing magnet ring (7), and the magnet ring that floats (6) and fixing magnet ring (7) all radial magnetizings, the one side that floating magnet ring (6) is relative with fixing magnet ring (7) is like pole, described floating magnet ring (6) is positioned between housing (9), and the outer ring of the magnet ring that floats (6) and housing (9) and is respectively arranged with squeeze film (1) between the inner ring of floating magnet ring (6) and fixing magnet ring (7).
The squeeze film damper of band floating magnet ring the most according to claim 1, it is characterized in that: the bottom of described housing (9) is provided with cannelure, and being provided with multiple spherical ball (8) in cannelure, described floating magnet ring (6) is placed in multiple spherical ball (8).
The squeeze film damper of band floating magnet ring the most according to claim 1 and 2, it is characterised in that: described housing (9) is made up of non-magnet material.
The squeeze film damper of band floating magnet ring the most according to claim 3, it is characterised in that: described housing (9) is made up of aluminum alloy materials.
The squeeze film damper of band floating magnet ring the most according to claim 1 and 2, it is characterised in that: described fixed support (5) is made up of rustless steel or aluminum alloy materials.
The squeeze film damper of band floating magnet ring the most according to claim 1 and 2, it is characterised in that: described elastic shaft (2) is made up of stainless steel material.
The squeeze film damper of band floating magnet ring the most according to claim 1 and 2, it is characterised in that: it is provided with elastic damping part between described housing (9) and the outer ring of floating magnet ring (6).
The squeeze film damper of band floating magnet ring the most according to claim 7, it is characterised in that: described elastic damping part is wire netting or powder metallurgy ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807426.8A CN104455200B (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807426.8A CN104455200B (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104455200A CN104455200A (en) | 2015-03-25 |
| CN104455200B true CN104455200B (en) | 2016-09-14 |
Family
ID=52901752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410807426.8A Active CN104455200B (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104455200B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864352B (en) * | 2016-04-29 | 2018-06-08 | 武汉理工大学 | A kind of marine drive shafting Electromagnetic heating damping unit |
| CN108591256B (en) * | 2018-04-02 | 2019-08-27 | 江苏理工学院 | Permanent-magnet bearing with damping function |
| CN109668717B (en) * | 2018-12-17 | 2020-07-28 | 南京航空航天大学 | Double-layer oil film double-support squeeze oil film damper |
| CN112211939A (en) * | 2020-10-30 | 2021-01-12 | 江苏理工学院 | Damping device |
| CN114812353B (en) * | 2022-03-16 | 2024-01-30 | 西北工业大学 | Component for measuring eccentric amount of extrusion oil film damper |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631812A (en) * | 1986-06-18 | 1988-01-06 | Toshiba Corp | Magnetic top bearing device for vertical type rotor |
| JPS6331812A (en) * | 1986-07-25 | 1988-02-10 | Mazda Motor Corp | Suspension device for automobile |
| JP3168596B2 (en) * | 1991-03-26 | 2001-05-21 | 日本精工株式会社 | Superconducting bearing device |
| JP2629561B2 (en) * | 1993-06-28 | 1997-07-09 | 株式会社日立製作所 | Polygon mirror drive motor for laser beam scanning |
| CN101255892B (en) * | 2001-11-13 | 2011-11-16 | Ntn株式会社 | Fluid bearing device |
| JP4740721B2 (en) * | 2005-11-15 | 2011-08-03 | ポリマテック株式会社 | Viscous fluid filled damper |
| CN103225669B (en) * | 2013-04-25 | 2015-11-18 | 江苏理工学院 | With the Permanent-magnet bearing squeeze film damper of elastic ring |
| CN103216571B (en) * | 2013-04-26 | 2016-08-10 | 江苏理工学院 | Permanent-magnet bearing squeeze film damper |
| CN204344798U (en) * | 2014-12-23 | 2015-05-20 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
-
2014
- 2014-12-23 CN CN201410807426.8A patent/CN104455200B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104455200A (en) | 2015-03-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |